fn test_v2_wrong_max_snapshot_sequence_number()

in crates/iceberg/src/spec/table_metadata.rs [2037:2117]

• 78 lines of code
• 1 McCabe index (conditional complexity)

    fn test_v2_wrong_max_snapshot_sequence_number() {
        let data = r#"
        {
            "format-version": 2,
            "table-uuid": "9c12d441-03fe-4693-9a96-a0705ddf69c1",
            "location": "s3://bucket/test/location",
            "last-sequence-number": 1,
            "last-updated-ms": 1602638573590,
            "last-column-id": 3,
            "current-schema-id": 0,
            "schemas": [
                {
                    "type": "struct",
                    "schema-id": 0,
                    "fields": [
                        {
                            "id": 1,
                            "name": "x",
                            "required": true,
                            "type": "long"
                        }
                    ]
                }
            ],
            "default-spec-id": 0,
            "partition-specs": [
                {
                    "spec-id": 0,
                    "fields": []
                }
            ],
            "last-partition-id": 1000,
            "default-sort-order-id": 0,
            "sort-orders": [
                {
                    "order-id": 0,
                    "fields": []
                }
            ],
            "properties": {},
            "current-snapshot-id": 3055729675574597004,
            "snapshots": [
                {
                    "snapshot-id": 3055729675574597004,
                    "timestamp-ms": 1555100955770,
                    "sequence-number": 4,
                    "summary": {
                        "operation": "append"
                    },
                    "manifest-list": "s3://a/b/2.avro",
                    "schema-id": 0
                }
            ],
            "statistics": [],
            "snapshot-log": [],
            "metadata-log": []
        }
    "#;

        let err = serde_json::from_str::<TableMetadata>(data).unwrap_err();
        println!("{}", err);
        assert!(err.to_string().contains(
            "Invalid snapshot with id 3055729675574597004 and sequence number 4 greater than last sequence number 1"
        ));

        // Change max sequence number to 4 - should work
        let data = data.replace(
            r#""last-sequence-number": 1,"#,
            r#""last-sequence-number": 4,"#,
        );
        let metadata = serde_json::from_str::<TableMetadata>(data.as_str()).unwrap();
        assert_eq!(metadata.last_sequence_number, 4);

        // Change max sequence number to 5 - should work
        let data = data.replace(
            r#""last-sequence-number": 4,"#,
            r#""last-sequence-number": 5,"#,
        );
        let metadata = serde_json::from_str::<TableMetadata>(data.as_str()).unwrap();
        assert_eq!(metadata.last_sequence_number, 5);
    }